/Engine/Source/Runtime/Engine/Classes/Camera/PlayerCameraManager.h
Does the actual work to UpdateViewTarget. This is called from UpdateViewTarget under normal circumstances (target is not a camera actor and no debug cameras are active) Provides a way for subclasses to override behavior without copy-pasting the special case code.
virtual void UpdateViewTargetInternal ( [FTViewTarget](API\Runtime\Engine\Camera\FTViewTarget) & OutVT, float DeltaTime )